Iranian officials say they hope Europe will work with them to preserve the deal, and already the E.U. is indicating it is ready to stand alongside Tehran.

Late Tuesday night, President Hassan Rouhani said he’d be sending Iranian Foreign Minister Mohammad Javad Zarif to the countries still in the deal — China, France, Germany, Russia and the United Kingdom.

Rouhani made a point of stressing that Iran, at any time, could resume its nuclear program.

“So if necessary, we can begin our industrial enrichment without any limitations,” the Iranian leader said.

“Until implementation of this decision, we will wait for some weeks and will talk with our friends and allies and other signatories of the nuclear deal, who signed it and who will remain loyal to it. Everything depends on our national interests.”